rtpAnalyze matlab tool: filter out RTCP packets

rtpAnalyze matlab tool: filter out RTCP packets

This change relates to the matlab tool rtpAnalyze. With this change,
RTP packets with payload types 72 through 76 are removed. In IETF
RFC3551, section "Payload Type Definitions", this range is marked as
reserved so that RTCP and RTP packets can be reliably distinguished.

BUG=webrtc:2692
TBR=tina.legrand@webrtc.org
NOTRY=true

Committed: https://crrev.com/d84dcbd2ecd28bd57e1f17bc00dc6390cbbd0cda
Cr-Commit-Position: refs/heads/master@{#9724}

[hlundin-webrtc, 2015-08-18 11:45:57]

The CQ bit was checked by henrik.lundin@webrtc.org

[commit-bot: I haz the power, 2015-08-18 11:46:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1284423006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1284423006/1

[commit-bot: I haz the power, 2015-08-18 11:46:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-18 11:46:58]

Patchset 1 (id:??) landed as
https://crrev.com/d84dcbd2ecd28bd57e1f17bc00dc6390cbbd0cda
Cr-Commit-Position: refs/heads/master@{#9724}